Make a couple of standard lists, and modify from there (slightly).
Remaking spell lists is a task to be done outside of games, not in the middle. If a special need comes out, swap one of the spells on your standard list. Any time you level (obviously at the end of a session) you can spend time working over your entire list.
As a DM, I got annoyed some times with spell casters taking lots of time to play with spell lists. More often than not, they would have been better off not messing with their standard spells.
Remaking spell lists is a task to be done outside of games, not in the middle. If a special need comes out, swap one of the spells on your standard list. Any time you level (obviously at the end of a session) you can spend time working over your entire list.
As a DM, I got annoyed some times with spell casters taking lots of time to play with spell lists. More often than not, they would have been better off not messing with their standard spells.